Product Introduction
The ground network earth resistance tester utilizes frequency-conversion technology and microprocessor control to accurately measure grounding resistance (4Ω-10Ω), contact/step voltage, and soil resistivity. Featuring 50Hz anti-interference capability and 3A test current, it enables reliable live-grid testing without power outages. The compact design significantly improves efficiency, reducing testing time and labor intensity compared to traditional 30A methods. Suitable for substations, power plants, and lightning protection systems.
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Product functions
1. Grounding Resistance Measurement: It measures power frequency grounding impedance, contact voltage, step voltage, power frequency characteristic parameters, and soil resistivity of various grounding devices. The measurement range is 0 to 200Ω (including current pile impedance) with a resolution of 0.001Ω .
2. Variable Frequency Anti-Interference: It uses a new variable frequency AC power supply (45Hz/55Hz sine wave) and microcomputer processing control with modern software and hardware filtering technology, solving the anti-interference problem in the test process.
3. High Precision: The measurement error is only ±(reading × 1% + 0.005Ω) , allowing accurate measurement of grounding impedance in small ground networks.
4. Multiple Output Gears: The maximum output voltage is AC 400V (45Hz/55Hz dual-frequency sine wave), and the maximum output current is AC 5A. The output current has 9 gears (5A, 4.5A, 4A, 3.5A, 3A, 2.5A, 2A, 1.5A, 1A) in 0.5A increments.
5. No Power Failure Required: The ground network earth resistance tester manufacturer has strong anti-interference ability (anti-power frequency 50Hz voltage 10V), allowing measurement without power failure.
6. Safe Testing: The maximum test current is 3A, which will not cause excessive potential of the grounding device during the test.
7. Easy Operation: English menu operation with direct display of measurement results, requiring minimal wiring labor and no need for large current lines.
Key Features of Ground Grid Resistance Tester:
1. Precision Power Frequency Simulation - Delivers accurate sinusoidal waveforms with ±5Hz frequency variation (45Hz/55Hz), ensuring power frequency equivalence in measurements.
2. Advanced Anti-Interference Technology - Combines variable frequency measurement with digital filtering for stable, reliable data even in high-noise environments.
3. Exceptional Accuracy - Achieves 0.005Ω basic error resolution, capable of testing low-impedance grounding systems with precision.
4. Comprehensive Measurement Capabilities - Tests current/voltage poles, grounding resistance, step voltage, and contact voltage in one integrated solution.
5. User-Friendly Interface - Features intuitive English menu navigation with direct measurement readouts for simplified operation.
6. Efficient Field Operation - Eliminates heavy cabling requirements with compact design that doesn't require high-current lines.
Technical Advantages
1. Excellent Power Frequency Equivalence: The test current waveform is sinusoidal, and the frequency (45Hz/55Hz) differs from power frequency by only 5Hz, ensuring good equivalence to actual power frequency conditions.
2. Strong Anti-Interference: The variable frequency method combined with modern software and hardware filtering provides high anti-interference performance, ensuring stable and reliable test data even under strong interference environments.
3. High Precision: The basic error of only 0.005Ω enables accurate measurement of ground networks with low grounding impedance.
4. Powerful Functions: It can measure current pile, voltage pile, grounding resistance, step voltage, and contact voltage, making it a multi-purpose instrument.
5. Simplified Testing Process: The ground network earth resistance tester supplier eliminates the need for bulky test equipment and large current lines required by traditional power frequency high-current methods, greatly reducing labor intensity and test cost.
6. Easy to Operate: English menu operation with direct result display simplifies the testing process and improves work efficiency.
Technical parameter
| 測定範囲 | 0～200Ω(電流パイルインピーダンス含む) |
| 解決 | 0.001Ω |
| 測定誤差 | ±(測定値×1%+0.005Ω) |
| 最大出力電圧 | AC 400V (45Hz、55Hz、2周波、正弦波) |
| 最大出力電流 | AC 5A(45Hz、55Hz、2周波、正弦波) |
| アウトプットギヤ | 5 / 4.5 / 4 / 3.5 / 3 / 2.5 / 2 / 1.5 / 1a、0.5Aごと、合計9ギア |
| 耐干渉能力 | 反電源周波数 50Hz 電圧 10V |
| 測定ラインの要件 | 電流線の銅芯の断面積 ≥ 1.5mm2 |
| 電圧線の銅芯の断面積 ≥ 1.0mm2 | |
| 電源 | AC220V±10%、50Hz |
| 外形寸法 | 295×340×310mm3 |
| 楽器の重量 | 30kg |
Application Scenarios
1. Power Utilities and Substations: Used for testing the grounding resistance of large power grid ground networks in substations and power plants, ensuring the safety and reliability of grounding systems.
2. Power Plants: Used for testing grounding systems of thermal and hydro power plants.
3. Microwave Stations: Used for testing grounding systems of microwave communication stations.
4. Lightning Protection Systems: Used for testing grounding resistance of lightning rods.
5. Engineering Acceptance Testing: Used during the commissioning and acceptance of new grounding installations to verify compliance with regulations.
6. Routine Maintenance: Used for periodic testing of grounding systems to detect degradation and ensure continued safety.
Frequently Asked Questions
Q: What can this ground network earth resistance tester measure?
A: It can measure grounding resistance, contact voltage, step voltage, and soil resistivity, providing comprehensive testing of grounding systems.
Q: Where can the ground network earth resistance tester be used?
A: It is mainly used for grounding system testing in substations, power plants, lightning protection systems, and other large-scale electrical facilities.
Q: Can it be used for large grounding grids?
A: Yes. It is specifically designed for large grounding grid testing and is suitable for grounding systems in substations and power plants.
Q: Can it measure contact voltage and step voltage?
A: Yes. The ground network earth resistance tester factory supports contact voltage and step voltage measurements to help evaluate the safety of grounding systems.
Q: Is it suitable for periodic maintenance of grounding systems?
A: Yes. Power utilities, power plants, and electrical testing companies can use it for periodic inspection and preventive maintenance of grounding systems.
Q: What is the primary purpose of the ground network earth resistance tester?
A: It is used to measure the grounding resistance of large power grid ground networks, as well as contact voltage, step voltage, and soil resistivity. This test verifies that the grounding system provides a reliable, low-resistance path for fault currents, ensuring equipment safety and personnel protection.
Q: Why is variable frequency technology used?
A: Traditional power frequency high-current methods require very large test currents (≥30A) to overcome interference, resulting in bulky equipment and complicated testing. The ground network earth resistance tester uses variable frequency (45Hz/55Hz) technology with advanced filtering, which allows accurate measurement with a much smaller test current (maximum 5A) while maintaining strong anti-interference capability.
As an experienced manufacturer and supplier, we provide a wide range of professional testing equipment designed for accuracy, reliability, and long-term performance. Whether you need a single unit or bulk quantities, we can offer flexible solutions and a competitive price to meet your project requirements. Get in touch with us for product details, technical support, and a customized quotation.
